The component agar which was used as a laxative to treat stomach disorders is extracted from algae called agarphytes, gelidium, pterocladia etc. They bear one or more storage bodies, known as pyrenoids located in the chloroplast. amzn_assoc_default_search_phrase = "shoes"; The body consists of a few cells with thin sheaths, long filaments. Examples: Chrysamoeba, Lagynion, Chrysocapsa, Ochromonas, etc, Examples: Apedinella, Mesopedinella, Parapedinella, Actinomonas, Pteridomonas, Dictyocha, Pseudopedinella, Pedinella, etc. Examples: Cryptomonas, Chilomonas, Falcomonas, Rhinomonas, Plagioselmis, Teleaulax, etc. Leaves show parallel venation; They have fibrous root system. Examples: Sea lettuce (Ulva), Acetabularia, Caulerpa, Monostroma, etc. Examplses: Chlorella, Chlamydomonas, Oedogonium, Dunaliella, Volvox, etc. Science . They are the most important photosynthetic stramenopile algae. Botany, Eukaryotic Organisms, Algae, Classes of Algae. Share Your Word File Chlorophyceae are also called as ‘blue-green algae’. They inhabit in both in freshwater or marine environments. Algae cell wall composed of cellulose and pectin. Asexual and sexual reproduction occur. Photosynthetic species contain pigments like chlorophyll a and chlorophyll d. They do not contain flagella; mitochondria with flattened cristae. Biology Micro Organisms Part 4 (Protozoa, Algae) Class 8 VIII Most algae are aquatic but some are semi-aquatic and terrestrial. The motile form possesses two different flagella. They perform sexual reproduction which is isogamous type. In this case, photosynthetic pigments are chlorophylls a and chlorophyll b. Algae are unicellular, colonial or large multi-cellular organisms. amzn_assoc_search_bar_position = "bottom"; Chlorophyceae: Chlorophyll a and b are present in them and impart the green colour. Server 1 Server 2. Green algae have dark- to light-green coloration that comes from having chlorophyll a and b, which they have in the same amounts as "higher plants"—the plants, including seed plants and ferns, that have well-developed vascular tissues that transport organic nutrients. Chlorophyceae (Green algae) General characterstics of Chlorophyceae. Most of them inhabit in freshwater environment. Most of them are photosynthetic marine organisms but few are parasitic. They are also known as brown algae or brown seaweeds. All unicellular or colonial, principal pigments are chlorophyll a and c, β-carotene and xanthophyll’s, storage product in the form of fat, sexual reproduction is of widespread occurrence, cell wall of pectin and silica, silicified cell wall, precise nature of motile bodies not known, fresh water, marine and terrestrial. Based on colors, algae are divided into the following major four groups: They belong to the class Cyanophyceae under the phylum Cyanophyta. They are motile organisms which contain two parallel heterokont flagella. Answer: Monocots: Seeds have a single cotyledon. Mitochondria contain paddle-shaped cristae. Create your notes while watching video by clicking on icon in video player. Examples: Stonewort (Chara), filamentous (Spirogyra) and desmids. The cell body is asymmetric with dorsi-ventral sides. amzn_assoc_search_bar = "true"; They are the most important photosynthetic stramenopile algae. They also contain phycocyanin carotenoids, xanthophyll, and phycobilins and phycoerythrin (phycobiliproteins) as accessory pigments. These are eukaryotic organisms, autotrophic in nature as have chlorophyll in their cells. What is the significance of transpiration? Zoospores biflagellate or quadriflagellate flagella anterior isokontae, whiplash type, cell wall of cellulose and pectin, fresh water or marine. Class-VIII . Algae are usually green, but they can be found in a variety of different colors.Algae exist in environments ranging from oceans, rivers, and lakes to ponds, brackish waters, and even snow. amzn_assoc_default_browse_node = "672123011"; amzn_assoc_placement = "adunit0"; They store food as starch inside the chloroplast. These organisms do not share a common ancestor and hence, are not related to each other (polyphyletic).” We have often observed the presence of some slimy, green patchesin the water of ponds or in stagnant water; These green patches arise due to the presence of organisms called algae which contains chlorophyll that is responsible for its green colour. The photosynthetic pigments are chlorophyll a and chlorophyll c. They store foods as laminarin, maninitol and oils. 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